You can change the SAN Shared Storage Option configuration through Backup Exec Utility (Beutility.exe). This utility lets you designate a new primary database server.
If the current server is functioning, you should consider specifying the current primary server when installing SAN Shared Storage Option to the new system. This will allow you to test the fibre connections before designating a new database server. If the current database server is not functioning, installing the new system as the primary database server is recommended.
Refer to the Backup Exec Utility documentation for more information.